I wanted to do this one, for QUITE a long time, now!
Basically, this digimon has some likeness to Gatomon, only being MEGA level!
It comes in different attributes, as well as different colors. Not only can Gatomon evolve into this mega-level form, but so can BlackGatomon, and Mikemon.
= GranGatomon, alonggside the artwork, are (c) by me
= Gatomon, BlackGatomon, and Mikemon, alongside the "Digimon" franchise, are (c) by Bandai Namco